Riot police were patrolling parts of Hong Kong on Friday afternoon on the lookout for protesters after earlier calls online for gatherings in various districts.
Police occasionally stopped people for ID checks. But they were not encountering any groups of demonstrators.
On social media channels popular with anti-government protesters, there was a debate underway as to whether the recent calls for Labour Day protest action had been genuine.
The force had refused permission for a Labour Day march on Hong Kong Island, citing health risks due to the Covid-19 crisis.